Sidebeak Pencil-flower
Stylosanthes biflora
In the Carolinas and Georgia, found in longleaf pine sandhills, dry to moist (but not wet) pine savannas and flatwoods, dry forests, woodlands, woodland borders, glades, barrens, rock outcrops. Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition What its natural habitat tells you
Native to Arkansas. How scores work Is it native here?
Profile 100%
- Height
- Up to about 2 feet
- Light
- Full sun, Partial shade
- Soil moisture
- Somewhat dry to moist
At a glance
- Life cycle
- Perennial
- Bloom
- June to August
- Fruiting season
- July to October
Not yet recorded · Spread · Leaves
Recorded in 56 Arkansas counties.
Natural habitats
Places it grows wild. Not a planting requirement. Each habitat page lists the plants and wildlife also found there.
Forests and open woodlands on dry ridges and slopes, often oak or pine.
Forest or woodland where the source does not say how moist or dry.
Cliffs, ledges and rocky summits
Cliffs, ledges, rock outcrops, talus and rocky summits where the source does not name the rock. A named rock files the place under its own glade or outcrop type instead.
Also found with this plant
Wildlife whose habitat models include habitats this plant grows in, in Arkansas. Shared habitat, not food. 86 animals.
- American GoldfinchCarduelis tristis
- American RobinTurdus migratorius
- Bank SwallowRiparia riparia
- Blue GrosbeakPasserina caerulea
- Brown ThrasherToxostoma rufum
- Common NighthawkChordeiles minor
- Cooper's HawkAccipiter cooperii
- Eastern KingbirdTyrannus tyrannus
- Eastern Screech-owlMegascops asio
- Eurasian Collared-doveStreptopelia decaocto
- Great Horned OwlBubo virginianus
- Lark SparrowChondestes grammacus
- Northern BobwhiteColinus virginianus
- Northern FlickerColaptes auratus
- Northern MockingbirdMimus polyglottos
- Orchard OrioleIcterus spurius
- Pine SiskinCarduelis pinus
- Prairie WarblerDendroica discolor
- Purple FinchCarpodacus purpureus
- Red-tailed HawkButeo jamaicensis
- Red-winged BlackbirdAgelaius phoeniceus
- Rough-legged HawkButeo lagopus
- Sharp-shinned HawkAccipiter striatus
- Short-eared OwlAsio flammeus
Who uses this plant?
3CaterpillarsGenus host records with ranges including AR
Genus host records with ranges including AR · Stylosanthes
- Chloridea virescensTobacco Budworm Moth
- Spodoptera frugiperdaFall Armyworm Moth
- Stegasta bosqueellaRed-Necked Peanutworm
1BeesSoutheastern regional records
Southeastern regional records · Stylosanthes
Individual names are not available yet.
Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
0Specialist beesPollen specialists
—BirdsRecorded genus food-resource interactions; not a state feeding claim
1AntsRecorded seed interactions
- Pogonomyrmex badius
Pogonomyrmex badius: Seed predation.
Adult butterflies / moths 1
- Eurema lisa
Flower visits · Carlinville, Illinois, USA
No records yet · Beetles · Flies · Other wasps · Other insects
Plant details
- Family
- Fabaceae
- Hardiness
- Zones 4a–9b
- Soil pH
- Acidic
- Flower color
- Yellow or orange
- Fruit begins
- July
- Fruit ends
- October
Safety has not been reviewed for this plant; check toxicity and thorns before planting.
Growing sources and scope
- Bloom · “June to August” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Flower color · “Yellow or orange” · NC Extension Plant Toolbox (ranked first; Lady Bird Johnson Wildflower Center differs)
- Fruit begins · “July” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Fruit ends · “October” · Weakley, Flora of the Southeastern United States (2025), Carolinas & Georgia edition · Carolinas and Georgia
- Hardiness · “Zones 4a–9b” · NC Extension Plant Toolbox
- Height · “Up to about 2 feet” · Lady Bird Johnson Wildflower Center
- Life cycle · “Perennial” · NC Extension Plant Toolbox
- Light · “Full sun (6 or more hours of direct sunlight a day); Partial shade (direct sunlight only part of the day, 2-6 hours)” · NC Extension Plant Toolbox
- Soil · “Moist; Occasionally dry” · NC Extension Plant Toolbox
- Soil pH · “Acidic” · NC Extension Plant Toolbox
Also known as
Pencil Flower; Sidebeak Pencil flower
Conservation status
| Arkansas rank | SNR |
|---|---|
| Global rank | G5 |
| AR status | Not verified |
| Federal status | Not verified |
Will it fit your yard?
Check this plant against your county, sun and soil moisture. Conditions are checked in your browser.
Sources
- Atlas of the Vascular Plants of Arkansas (2013)
- USDA PLANTS
- Vascular Plants of North Carolina (NC Natural Heritage Program)
- Weakley, Flora of the Southeastern United States (2025)
- Arkansas occurrence source
- Shropshire & Tallamy 2025, Lepidoptera of North America north of Mexico, ZooKeys 1261 (ODbL)
- Noori, Seltmann & Orr 2026, A curated and integrated dataset for exploring global bee-plant interactions (GloBI), Zenodo, CC BY 4.0
- Smith, Bachelder, Russell, Morales, Mosher & Seltmann 2024, Bee-Specialization-Modeling v0.6.1 (specialist host table compiled from J. Fowler's pollen specialist bee lists), Zenodo, CC BY 4.0
- Hurlbert, Olsen, Sawyer & Winner 2021, Avian Diet Database, Scientific Data 8: 260 (CC0)
- Narango, Tallamy & Shropshire 2020, Few keystone plant genera support the majority of Lepidoptera species, Nature Communications